【Description】
49PCS Thread Repair Chaser Tool UNC UNF Metric Thread Restorer Kit is specially designed to repair worn and damaged threads, removing stubborn dirt and corrosion without breaking the integrity of the metal. 
It can efficiently chases threads on rusty fasteners, bolt holes on automotive cylinder heads, engine blocks, and vehicle bodies.

3 colors of the thread restorer set : silver (UNC), black (UNF), and gold (metric), which is easy for you to distinguish . The thread chaser kit and each holes of the box are marked the specification, which can help you to find the right one you need quickly.
The tool is made of high quality carbon steel ,the surface is oxidized,it is characterized by high strength, durability and corrosion resistance. The hexagonal thread tap and die can be used with any socket wrench.

【Applicable】
Suitable for many cars and other jobs.

【Specification】
Material: Carbon steel

【Includes】
24PCS Dies
National Coarse(NC) Sizes: 1/4"-20, 5/16"-18, 3/8"-16, 7/16"-14, 1/2"-13, 9/16"-12, 5/8"-11. 
National Fine(NF) Sizes: 1/4"-28, 5/16"-24, 3/8"-24, 7/16"-20, 1/2"-20, 9/16"-18, 5/8"-18. 
Metric Sizes: M6x1.00, M8x1.25, M10X1.0, M10x1.25, M10x1.50, M11X1.5, M12x1.25, M12x1.5, M12x1.75, M14X1.5mm.

22PCS Taps
National Coarse(NC) Sizes: 1/4"-20, 5/16"-18, 3/8"-16, 7/16"-14, 1/2"-13, 9/16"-12. 
National Fine(NF) Sizes: 1/4"-28, 5/16"-24, 3/8"-24, 7/16"-20, 1/2"-20, 9/16"-18. 
Metric Sizes: M6x1.00, M8x1.25, M10X1.0, M10x1.25, M10x1.50, M11X1.5, M12x1.25, M12x1.5, M12x1.75, M14X1.5mm.

3PCS Thread Files
SAE File: 9, 10, 12, 16, 20, 27, 28, 32. 
SAE File: 11, 12, 13, 14, 16, 18, 20, 24. 
Metric File: 0.75mm, 1.00mm, 1.25mm, 1.50mm, 1.75mm, 2.00mm, 2.50mm, 3.00mm.